# Topologically twisted index Electrically charged [[0178 BPS|BPS]] black holes are often studied. The partition function of the boundary theory in the supersymmetric background computes the superconformal index; for magnetically charged ones, however, the boundary partition function computes the *topologically twisted index* instead. ## Refs - [[2011#Hristov, Toldo, Vandoren]]: explains how the magnetic charge changes the [[0359 Supersymmetry|SUSY]] conditions - [[2015#Benini, Zaffaroni]] - [[2019#Zaffaroni (Lectures)]]